Well if Ray designed it then passed it on to the art department to draw it up..finding who worked in the Art Dept at that time would be like looking for a needle in a haystack.
I googled Pye Art Department but no definite hits..
So I looked it up, Ray definitely DID NOT design that album cover. It's clear in the liner notes from the reissue that he hated it and thought it should be a black album cover with the band's name on it. It's too bad they didn't credit the artist on the album.